Extremely isolated communities offer 'laboratory conditions' for examining the processes of language change and dialect formation. This book presents findings of the first-ever ethnographic fieldwork on the most remote island in the world with a permanent population, Tristan da Cunha. It documents the historical formation of a unique local dialect and investigates the sociolinguistic mechanisms that underlie dialect contact and new-dialect formation. It also uncovers the linguistic consequences of post-insularity - language change processes as a result of increasing contacts with other...

This sociolinguistic study offers a new theoretical framework for understanding the diffusion of language change within a community. Advanced statistical analysis methods are used in rigorously testing the supposed norm-enforcement effect of social networks. Revisions to the social network model are proposed, allowing the effects of various social factors operating simultaneously on the individual to be considered in evaluating the process of resistance to language change.